GB2202334A - A method of and apparatus for monitoring the tension of yarn - Google Patents
A method of and apparatus for monitoring the tension of yarn Download PDFInfo
- Publication number
- GB2202334A GB2202334A GB08806212A GB8806212A GB2202334A GB 2202334 A GB2202334 A GB 2202334A GB 08806212 A GB08806212 A GB 08806212A GB 8806212 A GB8806212 A GB 8806212A GB 2202334 A GB2202334 A GB 2202334A
- Authority
- GB
- United Kingdom
- Prior art keywords
- yarn
- tension
- voltage component
- alternating
- sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims description 10
- 238000012544 monitoring process Methods 0.000 title claims description 5
- 239000000523 sample Substances 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 claims description 2
- 230000003321 amplification Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/04—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
- G01L5/10—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means
- G01L5/106—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means for measuring a reaction force applied on a cantilever beam
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
- B65H59/40—Applications of tension indicators
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/04—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
- G01L5/10—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/04—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
- G01L5/10—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means
- G01L5/108—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means for measuring a reaction force applied on a single support, e.g. a glider
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2551/00—Means for control to be used by operator; User interfaces
- B65H2551/20—Display means; Information output means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2553/00—Sensing or detecting means
- B65H2553/20—Sensing or detecting means using electric elements
- B65H2553/22—Magnetic detectors, e.g. Hall detectors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/30—Handled filamentary material
- B65H2701/31—Textiles threads or artificial strands of filaments
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Spinning Or Twisting Of Yarns (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
- Filamentary Materials, Packages, And Safety Devices Therefor (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Description
1 j A method of and apparatus for monitoring the tension of yarn This
invention relates to a method of and apparatus for monitoring the tension of yarn by means of a sensor disposed in the feed path which generates an electric signal in dependence on the yarn's tension.
A number of devices are known f or checking the tension of yarn, which devices operate in different ways. DE-OS 35 06 698 describes a device for checking the yarn tension wherein the device is connected by an electrical conductor to a central computer. The latter evaluates the data received from various operating stations and indicates them centrally. However, a disadvantage of this device is that, although there is this central indication, the attendants at the various operating- stations remain uninformed.
It is therefore an aim of the present invention to obviate this deficiency, this being achieved by a method wherein the signal generated by the sensor is a multi-component signal comprising a constant-voltage component representing the yarn tension preset at the machine and an alternating-voltage component presenting interference peaks beyond the preset yarn tension, which multi-component signal is fed to an electronic device for segregating these components, and wherein deviations which occur only in the alternating-voltage component are collated with a centrally set value whereby any up or down deviation therefrom is indicated.
The apparatus for carrying out this method can be based on DE-OS 35 06 698 already referred to. As such, the apparatus comprises a sensor adapted to generate a multi-component signal comprising a constant- voltage component representing the yarn tension preset at the machine and an alternating-voltage component representing interference peaks beyond the preset yarn tension, in which the sensor includes a spring yarn guide, a permanent magnet and a Hall probe disposed opposite the magnet, and in which the signals are arranged to be evaluated by a window discriminator.
Preferably the apparatus includes a spring element fastened at one end and tipped at the extremity of its other end wih a low-friction diabolo such as sapphire. A permanent magnet is also fitted to this other end and a Hall probe is arranged opposite the magnet at a predetermined distance therefrom. The sensor feeds the multi-component signal to the built-in electronic device which segregates the alternating-voltage component from the constant-voltage component, the former component being C evaluated by a window discriminator. The latter, in turn, ascertains - in dependence on the centrally-set tolerances - whether or not the alternating-voltage signal is outside the tolerance limits and also differentiates between updeviations and down-deviations. If, for example, an interference peak exceeds the upper tolerance limit, a red luminous diode will light up while, if the peak exceeds the lower tolerances limit, this will be indicated by a yellow luminous diode.
Once the yarn tension has been adjusted, the luminous diode can be switched off by a resetting button. A green luminous diode can be provided f or the direct indication of any interference peak and thus for alerting the attendants.
As already stated, the constant-voltage component represents the yarn tension preset at the machine.
Central electronic means for determining the tolerances can cc;mprise a mains power supply for energising the various sensors, two potentiometers for setting the upper and lower tolerance limits and a resetting button for all stations or positions. Such a system renders it possible for the user to detect "on line" interference peaks at each station or position. The presetting required for the operation to be carried out is effected with the aid of the potentiometers by setting these to maximum for the upper tolerance and to minimum for the lower tolerance.
Checking of the preset values is effected with the aid of a measuring pick-up (movable sensor tester) which can be attached to the spindle, twisting apparatus or the like at the operating station to be checked. The measuring pick-up is equipped with a digital tension indicator and is connectable by a plug device to the sensor's signal output side. The zero point and amplification are checked with the aid of a swivelling device comprising a corresponding thread (yarn) and a predetermined defined tension. The calibration values are set via two potentiometers with reference to the digital indication. There is no difficulty in connecting the apparatus t o a data logging system since the sensor's clear-cut output signal is directly available for use in such a system.
An example' of apparatus in accordance with the invention will now be explained with reference to the accompanying drawings, in which: -1 Figure 1 is a front view of the apparatus; Figure 2 is a side view of the apparatus; and Figure 3 is a block diagram showing sensors arranged in a machine and connected to optical indicators.
Z The apparatus shown in Figures 1 and 2 comprises a sensor 1 having a flexibly-arranged yarn guide (diabolo) 2 and a permanent magnet 3 arranged opposite and at a predetermined distance from a Hall probe 4, the signal generated by the sensor 1 being a multi-component signal comprising a constant-voltage component representing the yarn tension preset at the machine and an alternatingvoltage component representing interference peaks beyond the preset yarn tension. Yarn 13 is guided over the diabolo 2 to a spindle, twisting unit or other operating station (not illustrated). Luminous diodes 5, 6 and 7, which optically indicate tolerance deviations, can be switched off by a resetting button 8. An electronic device 9 receives the multi-component signal of the sensor 1 and segregates them. Connection to a mains power supply 11 (see Figure 3) and to a data logging system 10 is made with the aid of a plug device 12.
Figure 2 clearly illustrates the springy path of the yarn 13 over the' sensor 1 in the course of which the yarn 13 is guided over the diabolo 2.
As shown in Figure 3, current is fed through the mains power support 11 where an up-deviation To and a down-deviation Tu are set with the aid of controls 14, 15 respectively of two potentiometers. A resetting button 16 serves for switching off all luminous diodes at the various working positions of a single machine.
It will therefore be seen that monitoring of the tension of the yarn is effected by the electronic device 9 with only the deviations which occur in the alternatingvoltage component being collated with a centrally-set value with a view to indicating any up or down deviations therefrom.
1 1 (
Claims (6)
1. A method of monitoring the tension of yarn in a yarn-feed path by means of a sensor disposed in the f eed path which generates an electric signal in dependence on the yarn's tension, wherein the signal generated by the sensor is a multi-component signal comprising a constant voltage component representing the yarn tension preset at the machine and an alternating-voltage component representing interference peaks beyond the preset yarn tension, which multi-component signal is fed to an electronic device for segregating these components, and wherein deviations which occur only in the alternating voltage component are collated with a centrally set value whereby any up or down deviation therefrom is indicated.
2. A method according to claim 1, wherein the up and/or down deviation is indicated by means of luminous diodes.
3. A method according to claim 1 or claim2, wherein the deviation(s) is or are., fed to one or more optical indicators and to a data-logging system.
4. Apparatus for carrying out the method claimed in claim 1 comprising a sensor adapted to generate a multi component signal comprising a constant-voltage component 9 k c reyrdionllflg 149 yiifl iflilgfl ppk-ooot at the machine and an alternating-voltage component representing interference peaks beyond the preset yarn tension, in which the sensor includes a spring yarn guide, a permanent magnet and a Hall probe disposed opposite the magnet, and in which the signals are arranged to be evaluated by a window discriminator.
5. Apparatus according to claim 4, in which luminous diodes extinguishable by a button - are provided to indicate any up and/or down deviation in the alternating-voltage component from a centrally set value.
6. Apparatus according to claim 4 or claim 5 substantially as described herein with reference to the accompanying drawings.
Published 1988 at The Patent Office, State House, 88f71 High Holborn, London WC1R 4TP. Purther copies may be obtained from The Patent OffIce, Sales Branch, St Mary Cray, Orpington, Kent BR5 3RD. Printed by Multiplex techniques ltd, St Mary Cray, Kent. Con. 1187.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19873708565 DE3708565A1 (en) | 1987-03-17 | 1987-03-17 | METHOD AND DEVICE FOR MEASURING A STRING TENSION |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8806212D0 GB8806212D0 (en) | 1988-04-13 |
| GB2202334A true GB2202334A (en) | 1988-09-21 |
| GB2202334B GB2202334B (en) | 1991-05-29 |
Family
ID=6323233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8806212A Expired - Lifetime GB2202334B (en) | 1987-03-17 | 1988-03-16 | A method of and apparatus for monitoring the tension of yarn |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4841784A (en) |
| JP (1) | JPS63290931A (en) |
| CH (1) | CH674772A5 (en) |
| DE (2) | DE8717830U1 (en) |
| FR (1) | FR2612636B1 (en) |
| GB (1) | GB2202334B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0439106A1 (en) * | 1990-01-26 | 1991-07-31 | Barmag Ag | Method and apparatus for monitoring yarn tension |
| EP0406735A3 (en) * | 1989-07-06 | 1991-12-27 | Barmag Ag | Method and apparatus for measuring the tension of an advancing yarn |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4129803A1 (en) * | 1991-09-07 | 1993-03-11 | Schlafhorst & Co W | THREAD STRENGTH SENSOR FOR A TEXTILE MACHINE |
| EP0852217A3 (en) * | 1997-01-03 | 1998-11-25 | New House Textiles Limited | A tension monitoring device |
| CN103510211A (en) * | 2013-09-17 | 2014-01-15 | 吴江永固纺配有限公司 | Active yarn feeding device of twisting spindle |
| WO2021116788A1 (en) * | 2019-12-10 | 2021-06-17 | Patel Brij | Tension sensor |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1573747A1 (en) * | 1966-01-24 | 1969-07-24 | Palitex Project Co Gmbh | Device for electrical measurement of the tension on running threads in textile machines |
| US4000782A (en) * | 1974-09-19 | 1977-01-04 | Standard Pressed Steel Co. | Tightening system with quality control apparatus |
| JPS58100068A (en) * | 1981-12-04 | 1983-06-14 | Hitachi Cable Ltd | Wire tangle detection device |
| DE3408497A1 (en) * | 1983-03-08 | 1984-09-13 | Peter Lancier Maschinenbau-Hafenhütte GmbH & Co KG, 4400 Münster | Measuring and display devices on cable winches |
| US4597297A (en) * | 1984-02-28 | 1986-07-01 | Badische Corporation | Tension measurement device |
| DE3506698A1 (en) * | 1985-02-26 | 1986-08-28 | FAG Kugelfischer Georg Schäfer KGaA, 8720 Schweinfurt | DEVICE FOR MEASURING THE THREAD TENSION OF A THREAD |
| CN1027926C (en) * | 1985-07-03 | 1995-03-15 | 巴马格巴默机器制造股份公司 | Continuous monitoring method for running yarns |
-
1987
- 1987-03-17 DE DE8717830U patent/DE8717830U1/en not_active Expired - Lifetime
- 1987-03-17 DE DE19873708565 patent/DE3708565A1/en not_active Ceased
-
1988
- 1988-01-29 FR FR8801042A patent/FR2612636B1/en not_active Expired - Fee Related
- 1988-03-03 CH CH850/88A patent/CH674772A5/de not_active IP Right Cessation
- 1988-03-10 JP JP63055113A patent/JPS63290931A/en active Pending
- 1988-03-15 US US07/168,500 patent/US4841784A/en not_active Expired - Fee Related
- 1988-03-16 GB GB8806212A patent/GB2202334B/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0406735A3 (en) * | 1989-07-06 | 1991-12-27 | Barmag Ag | Method and apparatus for measuring the tension of an advancing yarn |
| EP0439106A1 (en) * | 1990-01-26 | 1991-07-31 | Barmag Ag | Method and apparatus for monitoring yarn tension |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63290931A (en) | 1988-11-28 |
| DE8717830U1 (en) | 1990-06-13 |
| US4841784A (en) | 1989-06-27 |
| CH674772A5 (en) | 1990-07-13 |
| FR2612636B1 (en) | 1993-09-17 |
| DE3708565A1 (en) | 1988-09-29 |
| FR2612636A1 (en) | 1988-09-23 |
| GB2202334B (en) | 1991-05-29 |
| GB8806212D0 (en) | 1988-04-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20000316 |